Fix test for updated ruby 2.3.1
Fix test for updated ruby 2.3.1

mfojtik/sti-ruby,sclorg/s2i-ruby-container,hhorak/sti-ruby,bparees/sti-ruby,hhorak/sti-ruby,openshift/sti-ruby,bparees/sti-ruby,sclorg/s2i-ruby-container,mfojtik/sti-ruby,sclorg/s2i-ruby-container,openshift/sti-ruby